I am trying to test XPath expressions for an XML file (XML Perspective) which contains a default namespace. It is my understanding that in the XPath Expression View, I should be able to define the default namespace by selecting the "Edit Namespace Prefixes" option from the View's toolbar. However, when selecting this option, nothing happens (tried on Win and Mac with Eclipse 3.7 Indigo / XML Editors and Tools v. 3.3.0).